壁面滑移對聚合物微擠出成型流變特性的影響研究
馮英聰1，王敏杰1，李紅霞1，高健2，孫昉2（1.大連理工大學機械工程學院，遼寧大連116024；2.陸裝大連軍代室，遼寧大連116024）
摘要：建立了微尺寸下壁面滑移的剪切黏度模型和粘性耗散模型，計算了聚苯乙烯材料在微擠出成型過程中考慮壁面滑移的速度和壓力分布情況，并分析了速度和壓力的變化對剪切黏度和粘性耗散等流變特性的影響規律。結果表明，壁面滑移導致剪切黏度和粘性耗散對速度和壓力的響應產生顯著的變化，聚合物微擠出成型過程中壁面滑移對剪切黏度和粘性耗散的影響不可忽略。
關鍵詞：聚合物；微擠出成型；壁面滑移；剪切黏度；粘性耗散
中圖分類號：TG76；TP391.75 文獻標識碼：A
文章編號：1001-2168（2021）08-0001-08
DOI：10.16787/j.cnki.1001-2168.dmi.2021.08.001
Study on effects of wall slip on rheological properties of polymer micro extrusion
FENG Ying-cong1, WANG Min-jie1, LI Hong-xia1, GAO Jian2, SUN Fang2 (1.School of Mechanical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China; 2.Dalian Representative Office, Dalian, Liaoning 116024, China)
Abstract: The shear viscosity model and viscous dissipation model considering wall slip at micro scale were established, the velocity and pressure distribution of polystyrene (PS) material considering wall slip in micro extrusion process were calculated, and the effects of velocity and pressure on shear viscosity and viscous dissipation were analysed. The results showed that the responses of shear viscosity and viscous dissipation to velocity and pressure changed significantly due to wall slip. Therefore, the effects of wall slip on shear viscosity and viscous dissipation in polymer micro extrusion process couldn't be ignored.
Key words: polymer; micro extrusion; wall slip; shear viscosity; viscous dissipation